A worker tests a guitar in the guitar industrial park in Zheng'an County of Zunyi, southwest China's Guizhou Province, May 16, 2019. The guitar industrial park located in Zheng'an County has attracted nearly 50 guitar manufacturing and supporting enterprises to settle in and produces and sells more than 5 million guitars annually to over 30 countries and regions. (Xinhua/Luo Xinghan)